No species is immune from the suffering of unrequited love, but scientists expect to learn volumes about the biological basis of sex from the newly sequenced genome of an all-female, asexual Texas ...

For the tiny, dull male Mexican molly fish, desperate times call for desperate measures. Its female counterpart is promiscuous and selective. She prefers giant, colorful males, causing smaller ones to ...

No species is immune from the suffering of unrequited love, but scientists expect to learn volumes about the biological basis of sex from the newly sequenced genome of an all-female, asexual Texas ...

The Amazon Molly fish defies evolutionary rules by reproducing without the help of a male, because there are none in the species. It relies on a dalliance with other male fish to trigger its ...

Evolutionary theory suggests that species favouring asexual reproduction will rapidly become extinct, as their genomes accumulate deadly mutations over time. But a study on an Amazon fish has cast ...